Femtosecond laser inscription of Bragg grating waveguides in bulk diamond
Bharadwaj V., Courvoisier A., Fernandez TT., Ramponi R., Galzerano G., Nunn J., Booth MJ., Osellame R., Eaton SM., Salter PS.
© 2017 Optical Society of America. Femtosecond laser writing is applied to form Bragg grating waveguides in the diamond bulk. Type II waveguides are integrated with a single pulse point-by-point periodic laser modification positioned toward the edge of the waveguide core. These photonic devices, operating in the telecommunications band, allow for simultaneous optical waveguiding and narrowband reflection from a fourth-order grating. This fabrication technology opens the way toward advanced 3D photonic networks in diamond for a range of applications.